Chemical-feeder for filters



2 Sheets-Sh'eet 1.

(No-ModeI.)

0. H. & W. M. JEWELL. CHEMICAL FEEDER FOR FILTERS.

Patented Nov. 11,1890.

llHll lilHll 2 Sheets-Sheet 2.

(No Model.)

0.11. & W; M. JEWELL, CHEMICAL FEEDER POE FILTERS.

Patented Nov. 11, 1890.-

UNITED STATES PATENT Crrrcn.

OMAR H. JEIVELL AND \VILLIAM M. JEWELL, OF CHICAGO, ILLINOIS.

CHEMICAL-FEEDER FOR FILTERS.

SPECIFICATION forming part of Letters Patent No. 440,162, dated November11, 1890.

Application filed September 1, 1390- Serial No. 363,708. (No model.)

.of which the following is a specification, reference being had thereinto the accompanying drawings.

This our invention relates to apparatus for purifying water by theadmixture of chemicals and the subsequent filtering thereof, and

more particularly to improvements on the chemical-feeder described inLetters Patent of the United States, No. 423,773, granted to ,us on the18th day of March, 1890.

This invention has for its object; to provide such a chemical-feeder soconnected with the water-supply pipe that a uniform portion of the Waterwill pass through the same and through the chemicals therein, the exactproportion of such water to be adjustable by a valve, and in which thefeed of the chemical solution is made visible for observation; and withthese objects in View our invention consists of the novel devices andcombinations of devices hereinafter described and specifically claimed.

In the accompanying drawings, Figure 1 represents a longitudinalvertical section through the center of the apparatus; Fig. 2, an endelevation of the lower portion of the same, and Fig. 3 a plan view ofthe lower sec tion detached with the central screw-plug removed.

Corresponding letters of reference in the several figures of thedrawings designate like parts.

The chemical-tank consists of a flanged bottom ring A and a flangedcap-piece B, both of cast metal, and an intermediate cylindrical shellC, of sheet metal, expanded with its lower and upper ends into bothparts A and B, and secured therein by rivets, bolts, or soldering, inany well-known manner, so as to form hermetic joints therewith.

The flange of ring A is closely fitted upon a similar flange of thelower chamber=-piece D, and both are detaohably connected by a series ofbolts a. This chamberpiece D has formed to its bottom a tubularextension I),

having to both ends screw -tapped holes 0 and d, for coupling thereinthe supply-pipe and the filtering-tank feed-pipe for the water to flowthrough such tubular extension in the direction of the arrow on itscourse toward the filtering-tank. The flow of the water through thistube 1), however, is resisted by a lid-valve e, that may either operateby its gravitation alone or by an additional spring device, as shown inour former patent above referred to. The trunnions of this valve 6 restin suitable side bearings f, cast in tube 19, and the valve 6 isinserted into tubeb, through a tap-hole in the bottom of the chamber D,which is then closed by a screw-plug g.

In one side of chamber-piece D,t0 be solid with the bottom and side wallthereof, is formed a protuberance h, that is vertically bored andcounterbored to provide a small channel t', communicating Wit-h tubebbehind valve g, and forming a seat for a small ballvalvej, the upperoutlet of this channelibeing closed by a screw-plug 7c; Radially in linewith this channel ia hole is bored through the side wall ofchamber-piece D and through protuberance h to provide a small vent Zfrom channel "1; into the chemical-tank, and a taphole in the side wallfor screwing therein a stuffing-box m, having gland n, and through thisstuffing-box m and gland n is passed a valve-stem 0, beingscrew-threaded near its inner end to engage a screw-thread in thestuffing-box m, and having mounted upon its exterior end a hand-wheel12. The pointed end of this valve-stem 0 meets vent Z for adjusting theescape of water through such vent into the chemical-tank.

The cap-piece B has a large opening closed by a screw-cap forintroducing the chemicals into the tank, and it also has secured to itstop a glass cylinder q, fitted with its lower end in a recess of suchcap-piece B, and having fitted to its top a metal dome r, fixed to thecap-piece by a series of screw-bolts s, the joints between the ends ofglass cylinder q and its top and bottom metal bearing-surfaces beingpacked with rubber gaskets in the usual manner.

A pipe 15, being tapped with one end through cap-piece B and with itslower end through inward flange of ring A, communicates with a hole u,drilled through protuberance 1), that is diametrically opposite toprotuberance it inside of chamber-piece B to provide acommunicating-channel between the interior of glass cylinder q and theinside of tube 1) forward of valve 6. Close to pipe t the cap-piece Bhas a downwardly-projecting boss w bored and counterbored to provide aseat for a conical check-valve w and screw-tapped in the upper end ofthe bore for a goose-neck pipe y, extending into the dome 1" inside ofglass cylinder q, withits downwardly-pointed opening vertically in linewith pipe t for the liquid passing up in such goose-neck y to dischargedirectly into such pipe t. In one side the chamber-piece B is tapped andhas connected a discharge-cock z.

The operation of the apparatus is as follows, to Wit: The tank beingfilled with chemicals to about the height, as shown, and waterbein gforcedin from a pipe coupled with tubular chamber 6 at c to pass offinto the filtering-tank through a pipe connected with the tubularchamber at d. A small portion of this water by the resistance of valve 6will be forced to flow past valvej, through vent 1, into the bottom ofthe tank, the amount or flow of such water being regulated by theadjustment of valve-stem 0. The water thus entering the tank will risethrough the chemicals until its level reaches the bottom of boss w, whenthe atmospheric air imprisoned under cap-piece B will prevent a furtherrising. The water thus rising through the chemicals will dissolve aportion of the same, and the solution will now escape through goose-neckpipe 3 by first raising ch eck-valve k; This solution as it escapes indrops from the end of the goose-neck will discharge into pipe tto escapethrough hole to into the current of water forward of valve 6 to mixtherewith. There will be no rise of water to any extent in pipe t,because the water forward of v valve 6 is nolonger obstructed in itsflow. As

the Water is discharged from the downwardpointing end of goose-neck yand falls in drops to enter pipe 75, it has to pass through the openspace inside of glass cylinder (1, that only contains atmospheric air,and its passage from one pipe tothe othercan thus be observed throughthe glass to ascertain not only the proportional quantity of suchsolution to be intermixed with the water to be filtered, but also toinspect the proper operation of the apparatus and to observe at a glancewhether any obstruction prevents the feeding of the chemical solution.By this device the quantity of chemicals to be intermixed with the Waterwill be always in proper uniform proportion to the quantity of waterpassing through tubular chamber 1), because with a more forcible currentmore water will enter through vent Z when a proportionally-larger amountof chemical solution will be dis charged into pipe t than With a lessforcible current.

This device, as will be readily seen, is very simple and not apt to getout of order.

WVhat we claim is 1. In a chemical-feeder to be operated in connectionwith a filter, the combination of the main water-supply channel providedwith a water-flow-obstruction valve, thewater-inlet vent at near thebottom of the chemical-tank, communicating with the main supply-channelrearward of the flow-obstructing valve and provided with a check-valve,a goose neck pipe on the cap of the chemical-tank, providing the outletfor the chemical solution, a glass casing or cup hermetically inclosingsuch goose-neck pipe, and a tube providing communication between suchglass casing and the main water-channel forward of theobstruction-valve, all substantially as set forth.

2. In a chemical-feeder to be operated in connection with a filter, thecombination of the main water-supply channelprovided with awater-flow-obstruction valve, the water-inlet vent at near the bottom ofthe chemical-tank, communicating with the main supply-channel rearwardof the water-flow-obstructing valve and provided with a gravitatingcheck-valve and with an adjustable water regulating valve, a goose-neckpipe on the cap of the chemicaltank, providing the outlet for thechemical solution past a gravitating check valve, a glass casing or cuphermetically inclosing such goose-neck pipe, and a tube providingcommunication between such glass casing and the main water-channelforward of the obstructing-valve, all substantially as set forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

OMAR H. .TEWELL.

WILLIAM M. JEW-ELL.

\Vitnesses: 7

WILLIAM H. LOTZ, OTTO LUEBKERT.

